Wireless Network Evolution

Tunisie Télécom

SLAHEDDINE MAAREF

TUNISIE TELECOM

ITU/BDT Arab Regional Workshop on Wireless Network Evolution

Muscut Oman 3-5 May 2004

Presentation outlines

1-Market envirenment2-Old Analog technologies used for rural wireless connectivity 3-Digital technologies used for rural

wireless connectivity4-conclusion

Telecommunications is a key enabler of economic and social development of a nation Universal service is a particularly urgent issue for rural and remote communities

1-Market envirenment

1-Market envirenment

– Today Internet access becomes as

essential as telephony

– New multimedia services and technological convergence are shifting the regulatory focus to UNIVERSAL ACCESS

• Regulators are focusing on universal access

• Specific conditions are elaborated for rural

areas coverage on fixed network licences

• Operatores are looking for economic and effecient solutions to provide universal

service for rural and remote communities -

1-Market envirenment (Cd)

2 - ANALOG WIRELESS TECHNOLOGIES

2.1 Mono-channel & Bi-channel system

Principe : use a radio link to connect remote subscriber

moddule to the subscriber

equipement into the swich

Frequency : UHF / VHF

Range : UP to 40 km

-

2.1 Mono-channel & Bi-channel system (Cd)

Applications : - isolated subscribers

- rural public phone - farm

- police - custom control

point

Service : basic telophony

-

Station d'abonné (une

ou 2 lignes)

Interface analogique (2 fils)

Central téléphonique

UHF/VHF

2.1 Mono-channel & Bi-channel system (Cd)

2-2 : Fixed Analog Cellular System

Priciple : use the analog cellular network to provide fixed

telephony serviceApplcations : connect isolated subscribers

located on the coverage area of the analog cellular Network

Frequency : 450 MHZ , 900 MHZRange : UP to 30km

Service mobile

Service fixe

Station de baseCommutateur du réseau mobile

Terminal d’abonné radio

RTC

2-2 : Fixed Analog Cellular System (Cd)

Common Standards used for Analog Cellular System

(*) AMPS (Advanced Mobile Phone System)

NMT (Nordic Mobile Télécommunications)

Origine Américain standard (1982)

Scandinavian Standard (1981)

Fréquency 900 Mhz 450 Mhz et 900 Mhz

Range 35 Km 40 Km (450 Mhz)

27 Km (900 Mhz)

2-2 : Fixed Analog Cellular System (Cd)

• N-AMPS (Narrow Advanced Mobile Phone)

TACS (Total Access cellular System)

E-TACS (Extended Total Access Cellular

J-TACS (Japan Total Access Systeù

2-2 : Fixed Analog Cellular System (Cd)

Others Standards used for Analog Cellular System

3 - DIGITAL WIRELESS TECHNOLOGIES

-

3-1 : Point to Multipoint Radio System

Principe : Radio acces Network point to multipoint using wired

and/or wireless termination

- Frquency : 1.4 Ghz - 2.7 Ghz

- TDM technologies

- Range : 10 to 200 km

Système de gestion de

réseau

Téléphone

Données bas débits

Interface Analogique/numérique

RTPC

Station centrale

FH(1,5 –> 2,7 GHz)

Station d'abonné

Données bas débits

Téléphone

Station d'abonné

Station d'abonné

Station Relais

Données bas débits

Téléphone

3-1 : Point to Multipoint Radio System (Cd)

Applications : Connectivity of small villages

Services : Telephony

Data (narrow band)

Management of Priority for some subscribers

Emmergency call

Capacity - Base station : 500 subscribers

- Terminal station : micro station : 2-4 sub

large station : 128 sub

3-1 : Point to Multipoint Radio System (Cd)

3-2 -Wireless local loop : WLL

Principle : using digital radio-acces to provide fixed

telophony service

Applications : connectivity of rural and suburban areas

Services : Telephony : All PSTN services Data : 64 kb/s and more

Système de gestion

V5.2 ou Analogique

Station centrale

PSTN

Zone Suburbaine/Rurale

BSC

Terminal d’abonné radio

BS

Réseau de transport FH, FO ou cuivre

(xDSL)

Réseau de transport FH, FO ou cuivre

(xDSL)

Interface radio

3-2 -Wireless local loop : WLL (Cd)

Contrôleur de station de base + Station de base

Téléphonie

données

3-2 -Wireless local loop : WLL (Cd)

Common Standards used for WLL

DECT (Digital Européean Cordless

Telecommunications)

CDMA (Code division Multiple

accès)

Origine Européen Standard (ETSI) Américain Standard

Fréquency 1880-1900 Mhz 450Mhz, 800 Mhz, 1.7-1.8 Mhz, 1.8-1.9 Mhz, 2.2-2.3,Mhz, 2.3-2.5 Mhz, 3.4-3.6 Mhz, 3.5-3.7 Mhz

Transmission AMRT/ DRT (Duplex à répartition temporelle)

CDMA

Range Up to 10 Km Up to 25 Km

3-2 -Wireless local loop : WLL (Cd)

Common Standards used for WLL (Cd)

DECT (Digital Européean Cordless Telecommunications)

CDMA (Code division Multiple accès)

Capacity of BS (0.5 Er/Sub, GoS = 1%)

100 abonnés - 1 RF (omni) : 800 lignes

- 12 RF (2 RF*6 secteurs) :

7000 lignes

Data LL 64 Kb/s -LL (128 Kb/s)

-ISDN 2 B+D

-Accès asymétriques (512 Kb/s down link)

-Accès Ethernet

3-3 : Fixed and /or Restricted GSM

- Principle : Using GSM Networks to provide fixed telephony ( or restricted mobility )

- Applications : Connectivity of rural areas

- Services : telephony : all GSM services

Data : - circuit : 9.6 kbps : - GPRS : 30-52 kbps

3-3 : Fixed GSM (Cd)

Fixed GSM Terminal

BTS

BTS

BSC

MSC

شكراMerci pour votre attention

Thank you for your attention

WiFi-RadioLAN

Slaheddine MAAREFTunisia Telecom

    

ITU/BDT Arab Regional Workshop on“Wireless Network Evolution”

 Muscat, Oman, 03-05 May 2004

 

Our thanks are adressed to Tunisian

Frequency Agency (ANF) promoter and

manager of this pilot projet

    

ITU/BDT Arab Regional Workshop on“Wireless Network Evolution”

 Muscat, Oman, 03-05 May 2004

 

PLAN• WIFI Overview.• Applications of RadioLAN Technologies.• Définition of Hot Spot.• Standardization of RadioLAN Technologies.• Tunisian ANF pilot project• Tests & évaluation.• Commercial WiFi applications• Conclusion.

WIFI Overview

• Wireless Local Area Network– Définition:

• Broadband Radio Network for interconnection of personnel data equipments (PC, lapTop, mobile terminal..) using high speed radio links.

– Dénominations :• WLAN : Wireless LAN• RLAN : Radio LAN• RLR: Réseau Local Radio

Applications of RadioLAN Technologies

1. To built new LANs (entreprises, universities, library, private …).

2. To offer connectivity inside public areas, transit areas, .. (Hot Spot).

What’s Hot Spot ?• Hot Spot is the area of coverage of Radio LAN

using the wireless standard 802.11 for Data transmission.

• Hot Spot to offer mobile high speed Data connectivity within the coverage area.

• Hot Spot usually implemented inside aéroports, hôtels, conférences centres, campus universitaires…

RadioLAN Standardisation

Coverage Range comparaison between 2,4GHz & 5GHz bandwidth at 15dBm

Tunisian ANF pilot project

• OBJECTIVES :

• To be in line with CMR-03 recommandations.

• Try WiFi solution for Internet accès : Hot Spot.

• Learn about RadioLAN Technologies

Deployement of the pilot project

• 3 Steps :

1. Technical Study : constraints & performances required .

2. Configuration & installation of équipements.

3. Tests & évaluations.

Technical Study

• Constraints to be observed :

- Data Sécurity- Spatial Constraint : maximum couverage, minimum interférence- Technical Constraint : power connectivity (best place), Ethernet accèss.

Constraint Spatial/Sécurity

Data Sécurity

•Radio transmissions Possibility of interception.

•Solutions : Access contrôl :- Spatial : Coverage Range Mesurement & contrôl. - Access adresses Control.Sécurité protocole : WEP (Wired Equivalent Privacy).

Configuration & Installation

– Installation of 2 RadioLANs inside 2 buildings located at 50m (ANF & Ministère des Technologies de la Communication et du Transport).

– Interconnexion of the two buildings using a bridge.

Configuration & Installation(Cd)

– Installation & configuration of a Billing System to charge Internet connexion.

– Installation & configuration of a Network Management System

WiFi Equipements for the pilot project

• Accès Points (5 for ANF building, 4 for Ministère building & 2 for interconnexion of the 2 buildings).

• Switchers (2 inside ANF building).

• Management & Billing system (2 SMB & 1 CMB).

• Portable terminals

Management system (2 SMB & 1 CMB)

• SMB - On Site MultiBox :– Users Authentication– Sessions management – Accounting of connexion time

• CMB - Central MultiBox :– Data base management .– Validation of authentication request of SMBs– SMB’s management

Network Topologie

Access Point Configuration inside ANF building (Ethernet connexion)

Internet

SMB/ANF

AP

Access Point Positions

AP3

AP1

AP2

Ground 1st Floor

AP4

AP5

 

2d Floor 3d Floor

Access Point PositionsANF Building

AP_TELMIN_3

AP_TELMIN_4

AP_TELMIN_2

AP_TELMIN_1

SMBTelmin

Access Point PositionsMinistère Building

Directionnel antennas Installation

Tests Évaluations

1- Radio Tests Results:

- Tested Signal Power : 15mW, 30mW, 50mW et 100mW.

- Data Speed : up to 5 Mb/s.

- Coverage Range : 15 to 25m.

2- Sécurity Tests :

Intrusion Tests :- at radioLAN level- at serveurs( firewall….) level- at coding level.- at Authentication level.

Sessions management tests

Tests Évaluations (Cd)

3-Operational Tests

System Administration :• Login Management.

• Access Point Management.

• VLAN Management.Network Coverage & handover.

4- Physical Tests– Mobile Terminals Mutuel Accès.

– Connectivity tests between servers : CMB, SMB1,SMB2.

Tests Évaluations (Cd)

Common WiFi Applications• Case of « Hot Spot »

Integrated access service included in the package offered by the area manager (could be free of charge) : Aireport, Railway Station…

example : Wayport Network (USA) for hôtels information.

Common WiFi Applications (Cd)

Access to ISPs

-Payement using credit card or prepaid card….

Mobiles opérators data access service using SIM card for authentication, charging...

Conclusion• WiFi technologies are developping very fast offring

new facilities for terminal mobility.

• Private & Public operators are in compétition sharing this promising market.

• Development of advanced Standards : 802.11b802.11g to get higher speeds & better security.

شكراMerci pour votre attention

Thank you for your attention